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Model 26

Integrated Frisker

Part Number: 48-3885

Features

Integrated, Lightweight Design Simplifies Frisking
Protective Rubber Covering Enhances Ruggedness, Water Resistance, and Non-Slip Comfort
Employs Standard 15.51 cm² GM Pancake Detector
Ratemeter, MAX Hold, and Scaler Operating Modes
Simple Two-Button Operation
Count Rate and Scaler Alarms
Automatic LCD Backlight Activation
Wrist Cuff and Lanyard Included

Frisking people and objects for alpha and beta contamination can be awkward because manipulation of the detector and the electronics requires the use of both hands. The cable-less Model 26 consolidates the electronics and the detector into one ergonomic housing. This optimized configuration incorporates a standard 15.51 cm²GM pancake probe, loud audio “click” output, and large auto-ranging LCD display with automatic back lighting into one convenient package, making it easier than ever to detect contamination.

Operation is kept extremely simple through the use of just two buttons. Another useful feature, especially when the display is not always directly visible, is the 'MAX' mode that captures the highest or peak count rate. The scaler mode, with a preset count time, allows the user to take a discrete measurement. This system also incorporates low power circuitry, delivering hundreds of hours of use with just two standard “AA” size batteries. The calibrator can protect parameters (cps/cpm, response time, alarm points, & scaler time) or allow the user to adjust them.

The Model 26 series may also be ordered with a standard 3 mm (1/8 in.) plug, mono headphone jack to better monitor the instrument's audible output in noisy environments (part number 4498-538). See more under the Options tab.

Specifications

Detector	Pancake GM detector, stainless steel screen (79% open)
Window Area	Active: 15.51 cm² (2.4 in²) Open: 12.26 cm² (1.9 in²)
Efficiency	Alpha ²³⁹Pu: 11% Beta ⁹⁹Tc: 14% ³²P: 32% ¹⁴C: 2% ⁹⁰Sr/⁹⁰Y: 22% ¹²⁵I: 0.2% Gamma 5.5 cps per μSv/hr (3300 cpm per mR/hr) (¹³⁷Cs) ^99mTc: ≤ 1%
Display	3½ digit LCD with large 12.7 mm (0.5 in.) digits, low battery indicator Units: cpm, cps
Range	0.1 cps to 1.99 kcps 1 cpm to 99.9 kcpm
Linearity	±10%
Backlight	Built-in ambient light sensor automatically activates low-power LED backlight, or may be configured for 'Continuous On' operations (will reduce battery life)
Controls	ON / OFF / QUIET: Press to turn ON; Tap to alternate between click audio and QUIET; Hold for OFF MODE: Alternates between NORMAL (count rate), MAX (captures peak rate), and SCALER (user-selectable preset count time from 0 to 20 min.). Each mode is separately programmable so it can be active or turned off.
Response Time	User-selectable from 1 to 60 seconds, or automatic FAST or SLOW
Resolving Time	Approximately 100 µs as defined by IEC 60325
Alarms	Count rate and scaler alarm setpoints adjustable over the display range
Overload Protection	High rate saturation protection, indicated by flashing display and audio alarm, prevents false display of lower count rates
Loss of Count Protection	After 60 seconds of no pulses from detector, unit will flash a zero reading and
Click Audio	Greater than 60 dB at 0.6 m (2 ft)
HV Testpoint	Accessible by removing battery cover, allows HV measurement and pulse injection for calibration using optional cable (PN: 8303-1044)
Temperature Range	-20 to 50 °C (-4 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Environmental Rating	NEMA 3 / IP 53
Power	Two “AA” batteries
Battery Life	Approximately 1000 hours of operations (as low as 500 hours with backlight configured for 'Continuous On'), 16-hour low battery warning
Construction	High-impact plastic with separate battery compartment, wrist cuff and lanyard included
Distance from Surface Plane to Screen	0.32 cm (0.125 in.)
Size (H x W x L)	4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.)
Weight	0.45 kg (1.0 lb)

Options

Option	Description	Part Number
Protective Cover with Tether	Adds tether to the detector protective cover to keep attached to instrument when cover is not in use.	4519-041
Headphone Jack	Adds headphone jack to instrument.	4498-538
Canvas Holster	Canvas holster with belt clip for Model 26 Series instruments.	2312577
Model 180-28	Sample holder for Model 26-Series friskers.	47-3948
Calibration Cable	Allows HV measurement and pulse injection into any Model 26 family of instruments (excluding the Model 26S) from 2019 and later. 99 cm (39 in.) long, C to test pin.	8303-1044
Extendable Pole	A lightweight pole with 5 telescoping sections and an adjustable clamp to hold a Model 26 Series Frisker. Useful to access high, low, or other hard to reach places. Length: 0.55 m (1.8 ft) collapsed, 1.5 m (4.92 ft) fully extended	4519-077
Transport & Storage Case for Model 26 and Extendable Pole	Rugged, waterproof, airtight, hard-shell case with dense foam padding to hold Model 26 and extendable pole.	2311064